I have been reading about the train system and if you are wanting to use the train not every day there is a regional day ticket (Lander ticket) Do you have to join DB to get a DB card before you can book tickets on line or from a machine. If so do they post overseas to you if you are not a local German.
I am wanting to travel from Hamburg airport to Rotenburg then to Bremen. I have read many negative reports of the Bahn but we will not have rental car due to the nature of our trip.
Looking forward to any suggestions.